The psp was released back in 2005 and there are also many newer versions released now.But still the hardware specificstions are the same.Improvement is in terms of software and design.The graphics of this console are good but still due to its outdated specifications newer games are not releasing on this platform.The games for this console are way too.much expensive.Now, even the popularity of the ps go and vita have been decreased due to mobile phones which provide free games and way better graphics than a psp.
The volume of psp is very low.Only advantage is its battery, that lasts for many hours.I would reccommend not investing money into a psp .Either buying a good smartfone will be an excellent option as they have all the latest titles and better graphics than a psp.Otherwise psp is an excellent portable console.